Based on the original Dungeons & Dragons adventure In Search of the Unknown by Mike Carr, HackMaster's Quest for the Unknown is for characters level 1-3.

Designed for beginning players and GameMaster's alike, Quest for the Unknown features the two level dungeon "The Caverns of Quasqueton." Built by Rogahn the Fearless and Zelligar the Unknown, who might have met untimely deaths while warring with the hated Gnome Protectorates, the PCs have the opportunity to raid their secret cavern base and escape with untold treasure!